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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.stream;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffers;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelDownstreamHandler;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelEvent;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFuture;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFutureListener;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandler;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipeline;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelStateEvent;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelUpstreamHandler;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.LifeCycleAwareChannelHandler;
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.MessageEvent;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLogger;
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLoggerFactory;
<a class="jxr_linenumber" name="33" href="#33">33</a>  
<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.ClosedChannelException;
<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> java.util.Queue;
<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentLinkedQueue;
<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicBoolean;
<a class="jxr_linenumber" name="39" href="#39">39</a>  
<a class="jxr_linenumber" name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> org.jboss.netty.channel.Channels.*;
<a class="jxr_linenumber" name="41" href="#41">41</a>  
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * A {@link ChannelHandler} that adds support for writing a large data stream</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * asynchronously neither spending a lot of memory nor getting</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * {@link OutOfMemoryError}.  Large data streaming such as file</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * transfer requires complicated state management in a {@link ChannelHandler}</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * implementation.  {@link ChunkedWriteHandler} manages such complicated states</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * so that you can send a large data stream without difficulties.</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * To use {@link ChunkedWriteHandler} in your application, you have to insert</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * a new {@link ChunkedWriteHandler} instance:</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * {@link ChannelPipeline} p = ...;</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> * p.addLast("streamer", &lt;b&gt;new {@link ChunkedWriteHandler}()&lt;/b&gt;);</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * p.addLast("handler", new MyHandler());</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> * Once inserted, you can write a {@link ChunkedInput} so that the</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> * {@link ChunkedWriteHandler} can pick it up and fetch the content of the</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> * stream chunk by chunk and write the fetched chunk downstream:</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> * {@link Channel} ch = ...;</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> * ch.write(new {@link ChunkedFile}(new File("video.mkv"));</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment"> * &lt;h3&gt;Sending a stream which generates a chunk intermittently&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment"> * Some {@link ChunkedInput} generates a chunk on a certain event or timing.</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> * Such {@link ChunkedInput} implementation often returns {@code null} on</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> * {@link ChunkedInput#nextChunk()}, resulting in the indefinitely suspended</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> * transfer.  To resume the transfer when a new chunk is available, you have to</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> * call {@link #resumeTransfer()}.</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> * @apiviz.landmark</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment"> * @apiviz.has org.jboss.netty.handler.stream.ChunkedInput oneway - - reads from</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/handler/stream/ChunkedWriteHandler.html">ChunkedWriteHandler</a>
<a class="jxr_linenumber" name="76" href="#76">76</a>          <strong class="jxr_keyword">implements</strong> ChannelUpstreamHandler, ChannelDownstreamHandler, <a href="../../../../../org/jboss/netty/channel/LifeCycleAwareChannelHandler.html">LifeCycleAwareChannelHandler</a> {
<a class="jxr_linenumber" name="77" href="#77">77</a>  
<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/logging/InternalLogger.html">InternalLogger</a> logger =
<a class="jxr_linenumber" name="79" href="#79">79</a>          InternalLoggerFactory.getInstance(ChunkedWriteHandler.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="80" href="#80">80</a>  
<a class="jxr_linenumber" name="81" href="#81">81</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Queue&lt;MessageEvent&gt; queue = <strong class="jxr_keyword">new</strong> ConcurrentLinkedQueue&lt;MessageEvent&gt;();
<a class="jxr_linenumber" name="82" href="#82">82</a>  
<a class="jxr_linenumber" name="83" href="#83">83</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx;
<a class="jxr_linenumber" name="84" href="#84">84</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicBoolean flush = <strong class="jxr_keyword">new</strong> AtomicBoolean(false);
<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> currentEvent;
<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> flushNeeded;
<a class="jxr_linenumber" name="87" href="#87">87</a>  
<a class="jxr_linenumber" name="88" href="#88">88</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     * Continues to fetch the chunks from the input.</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> resumeTransfer() {
<a class="jxr_linenumber" name="92" href="#92">92</a>          <a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx = <strong class="jxr_keyword">this</strong>.ctx;
<a class="jxr_linenumber" name="93" href="#93">93</a>          <strong class="jxr_keyword">if</strong> (ctx == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="94" href="#94">94</a>              <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="95" href="#95">95</a>          }
<a class="jxr_linenumber" name="96" href="#96">96</a>  
<a class="jxr_linenumber" name="97" href="#97">97</a>          <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="98" href="#98">98</a>              flush(ctx, false);
<a class="jxr_linenumber" name="99" href="#99">99</a>          } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="100" href="#100">100</a>             <strong class="jxr_keyword">if</strong> (logger.isWarnEnabled()) {
<a class="jxr_linenumber" name="101" href="#101">101</a>                 logger.warn(<span class="jxr_string">"Unexpected exception while sending chunks."</span>, e);
<a class="jxr_linenumber" name="102" href="#102">102</a>             }
<a class="jxr_linenumber" name="103" href="#103">103</a>         }
<a class="jxr_linenumber" name="104" href="#104">104</a>     }
<a class="jxr_linenumber" name="105" href="#105">105</a> 
<a class="jxr_linenumber" name="106" href="#106">106</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDownstream(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e)
<a class="jxr_linenumber" name="107" href="#107">107</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="108" href="#108">108</a>         <strong class="jxr_keyword">if</strong> (!(e instanceof MessageEvent)) {
<a class="jxr_linenumber" name="109" href="#109">109</a>             ctx.sendDownstream(e);
<a class="jxr_linenumber" name="110" href="#110">110</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="111" href="#111">111</a>         }
<a class="jxr_linenumber" name="112" href="#112">112</a> 
<a class="jxr_linenumber" name="113" href="#113">113</a>         <strong class="jxr_keyword">boolean</strong> offered = queue.offer((MessageEvent) e);
<a class="jxr_linenumber" name="114" href="#114">114</a>         assert offered;
<a class="jxr_linenumber" name="115" href="#115">115</a> 
<a class="jxr_linenumber" name="116" href="#116">116</a>         <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel = ctx.getChannel();
<a class="jxr_linenumber" name="117" href="#117">117</a>         <em class="jxr_comment">// call flush if the channel is writable or not connected. flush(..) will take care of the rest</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> 
<a class="jxr_linenumber" name="119" href="#119">119</a>         <strong class="jxr_keyword">if</strong> (channel.isWritable() || !channel.isConnected()) {
<a class="jxr_linenumber" name="120" href="#120">120</a>             <strong class="jxr_keyword">this</strong>.ctx = ctx;
<a class="jxr_linenumber" name="121" href="#121">121</a>             flush(ctx, false);
<a class="jxr_linenumber" name="122" href="#122">122</a>         }
<a class="jxr_linenumber" name="123" href="#123">123</a>     }
<a class="jxr_linenumber" name="124" href="#124">124</a> 
<a class="jxr_linenumber" name="125" href="#125">125</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleUpstream(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e)
<a class="jxr_linenumber" name="126" href="#126">126</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="127" href="#127">127</a>         <strong class="jxr_keyword">if</strong> (e instanceof ChannelStateEvent) {
<a class="jxr_linenumber" name="128" href="#128">128</a>             <a href="../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> cse = (ChannelStateEvent) e;
<a class="jxr_linenumber" name="129" href="#129">129</a>             <strong class="jxr_keyword">switch</strong> (cse.getState()) {
<a class="jxr_linenumber" name="130" href="#130">130</a>             <strong class="jxr_keyword">case</strong> INTEREST_OPS:
<a class="jxr_linenumber" name="131" href="#131">131</a>                 <em class="jxr_comment">// Continue writing when the channel becomes writable.</em>
<a class="jxr_linenumber" name="132" href="#132">132</a>                 flush(ctx, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="133" href="#133">133</a>                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="134" href="#134">134</a>             <strong class="jxr_keyword">case</strong> OPEN:
<a class="jxr_linenumber" name="135" href="#135">135</a>                 <strong class="jxr_keyword">if</strong> (!Boolean.TRUE.equals(cse.getValue())) {
<a class="jxr_linenumber" name="136" href="#136">136</a>                     <em class="jxr_comment">// Fail all pending writes</em>
<a class="jxr_linenumber" name="137" href="#137">137</a>                     flush(ctx, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="138" href="#138">138</a>                 }
<a class="jxr_linenumber" name="139" href="#139">139</a>                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="140" href="#140">140</a>             }
<a class="jxr_linenumber" name="141" href="#141">141</a>         }
<a class="jxr_linenumber" name="142" href="#142">142</a>         ctx.sendUpstream(e);
<a class="jxr_linenumber" name="143" href="#143">143</a>     }
<a class="jxr_linenumber" name="144" href="#144">144</a> 
<a class="jxr_linenumber" name="145" href="#145">145</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> discard(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <strong class="jxr_keyword">boolean</strong> fireNow) {
<a class="jxr_linenumber" name="146" href="#146">146</a>         ClosedChannelException cause = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="147" href="#147">147</a> 
<a class="jxr_linenumber" name="148" href="#148">148</a>         <strong class="jxr_keyword">for</strong> (;;) {
<a class="jxr_linenumber" name="149" href="#149">149</a>             <a href="../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> currentEvent = <strong class="jxr_keyword">this</strong>.currentEvent;
<a class="jxr_linenumber" name="150" href="#150">150</a> 
<a class="jxr_linenumber" name="151" href="#151">151</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.currentEvent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="152" href="#152">152</a>                 currentEvent = queue.poll();
<a class="jxr_linenumber" name="153" href="#153">153</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="154" href="#154">154</a>                 <strong class="jxr_keyword">this</strong>.currentEvent = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="155" href="#155">155</a>             }
<a class="jxr_linenumber" name="156" href="#156">156</a> 
<a class="jxr_linenumber" name="157" href="#157">157</a>             <strong class="jxr_keyword">if</strong> (currentEvent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="158" href="#158">158</a>                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="159" href="#159">159</a>             }
<a class="jxr_linenumber" name="160" href="#160">160</a> 
<a class="jxr_linenumber" name="161" href="#161">161</a>             Object m = currentEvent.getMessage();
<a class="jxr_linenumber" name="162" href="#162">162</a>             <strong class="jxr_keyword">if</strong> (m instanceof ChunkedInput) {
<a class="jxr_linenumber" name="163" href="#163">163</a>                 closeInput((ChunkedInput) m);
<a class="jxr_linenumber" name="164" href="#164">164</a>             }
<a class="jxr_linenumber" name="165" href="#165">165</a> 
<a class="jxr_linenumber" name="166" href="#166">166</a>             <em class="jxr_comment">// Trigger a ClosedChannelException</em>
<a class="jxr_linenumber" name="167" href="#167">167</a>             <strong class="jxr_keyword">if</strong> (cause == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="168" href="#168">168</a>                 cause = <strong class="jxr_keyword">new</strong> ClosedChannelException();
<a class="jxr_linenumber" name="169" href="#169">169</a>             }
<a class="jxr_linenumber" name="170" href="#170">170</a>             currentEvent.getFuture().setFailure(cause);
<a class="jxr_linenumber" name="171" href="#171">171</a>         }
<a class="jxr_linenumber" name="172" href="#172">172</a> 
<a class="jxr_linenumber" name="173" href="#173">173</a>         <strong class="jxr_keyword">if</strong> (cause != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="174" href="#174">174</a>             <strong class="jxr_keyword">if</strong> (fireNow) {
<a class="jxr_linenumber" name="175" href="#175">175</a>                 fireExceptionCaught(ctx.getChannel(), cause);
<a class="jxr_linenumber" name="176" href="#176">176</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="177" href="#177">177</a>                 fireExceptionCaughtLater(ctx.getChannel(), cause);
<a class="jxr_linenumber" name="178" href="#178">178</a>             }
<a class="jxr_linenumber" name="179" href="#179">179</a>         }
<a class="jxr_linenumber" name="180" href="#180">180</a>     }
<a class="jxr_linenumber" name="181" href="#181">181</a> 
<a class="jxr_linenumber" name="182" href="#182">182</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> flush(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <strong class="jxr_keyword">boolean</strong> fireNow) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="183" href="#183">183</a>         <strong class="jxr_keyword">boolean</strong> acquired;
<a class="jxr_linenumber" name="184" href="#184">184</a>         <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel = ctx.getChannel();
<a class="jxr_linenumber" name="185" href="#185">185</a>         <strong class="jxr_keyword">boolean</strong> suspend = false;
<a class="jxr_linenumber" name="186" href="#186">186</a>         flushNeeded = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="187" href="#187">187</a>         <em class="jxr_comment">// use CAS to see if the have flush already running, if so we don't need to take futher actions</em>
<a class="jxr_linenumber" name="188" href="#188">188</a>         <strong class="jxr_keyword">if</strong> (acquired = flush.compareAndSet(false, <strong class="jxr_keyword">true</strong>)) {
<a class="jxr_linenumber" name="189" href="#189">189</a>             flushNeeded = false;
<a class="jxr_linenumber" name="190" href="#190">190</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="191" href="#191">191</a>                 <strong class="jxr_keyword">if</strong> (!channel.isConnected()) {
<a class="jxr_linenumber" name="192" href="#192">192</a>                     discard(ctx, fireNow);
<a class="jxr_linenumber" name="193" href="#193">193</a>                     <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="194" href="#194">194</a>                 }
<a class="jxr_linenumber" name="195" href="#195">195</a> 
<a class="jxr_linenumber" name="196" href="#196">196</a>                 <strong class="jxr_keyword">while</strong> (channel.isWritable()) {
<a class="jxr_linenumber" name="197" href="#197">197</a>                     <strong class="jxr_keyword">if</strong> (currentEvent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="198" href="#198">198</a>                         currentEvent = queue.poll();
<a class="jxr_linenumber" name="199" href="#199">199</a>                     }
<a class="jxr_linenumber" name="200" href="#200">200</a> 
<a class="jxr_linenumber" name="201" href="#201">201</a>                     <strong class="jxr_keyword">if</strong> (currentEvent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="202" href="#202">202</a>                         <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="203" href="#203">203</a>                     }
<a class="jxr_linenumber" name="204" href="#204">204</a> 
<a class="jxr_linenumber" name="205" href="#205">205</a>                     <strong class="jxr_keyword">if</strong> (currentEvent.getFuture().isDone()) {
<a class="jxr_linenumber" name="206" href="#206">206</a>                         <em class="jxr_comment">// Skip the current request because the previous partial write</em>
<a class="jxr_linenumber" name="207" href="#207">207</a>                         <em class="jxr_comment">// attempt for the current request has been failed.</em>
<a class="jxr_linenumber" name="208" href="#208">208</a>                         currentEvent = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="209" href="#209">209</a>                     } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="210" href="#210">210</a>                         <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> currentEvent = <strong class="jxr_keyword">this</strong>.currentEvent;
<a class="jxr_linenumber" name="211" href="#211">211</a>                         Object m = currentEvent.getMessage();
<a class="jxr_linenumber" name="212" href="#212">212</a>                         <strong class="jxr_keyword">if</strong> (m instanceof ChunkedInput) {
<a class="jxr_linenumber" name="213" href="#213">213</a>                             <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/handler/stream/ChunkedInput.html">ChunkedInput</a> chunks = (ChunkedInput) m;
<a class="jxr_linenumber" name="214" href="#214">214</a>                             Object chunk;
<a class="jxr_linenumber" name="215" href="#215">215</a>                             <strong class="jxr_keyword">boolean</strong> endOfInput;
<a class="jxr_linenumber" name="216" href="#216">216</a>                             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="217" href="#217">217</a>                                 chunk = chunks.nextChunk();
<a class="jxr_linenumber" name="218" href="#218">218</a>                                 endOfInput = chunks.isEndOfInput();
<a class="jxr_linenumber" name="219" href="#219">219</a>                                 <strong class="jxr_keyword">if</strong> (chunk == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="220" href="#220">220</a>                                     chunk = ChannelBuffers.EMPTY_BUFFER;
<a class="jxr_linenumber" name="221" href="#221">221</a>                                     <em class="jxr_comment">// No need to suspend when reached at the end.</em>
<a class="jxr_linenumber" name="222" href="#222">222</a>                                     suspend = !endOfInput;
<a class="jxr_linenumber" name="223" href="#223">223</a>                                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="224" href="#224">224</a>                                     suspend = false;
<a class="jxr_linenumber" name="225" href="#225">225</a>                                 }
<a class="jxr_linenumber" name="226" href="#226">226</a>                             } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a class="jxr_linenumber" name="227" href="#227">227</a>                                 <strong class="jxr_keyword">this</strong>.currentEvent = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="228" href="#228">228</a> 
<a class="jxr_linenumber" name="229" href="#229">229</a>                                 currentEvent.getFuture().setFailure(t);
<a class="jxr_linenumber" name="230" href="#230">230</a>                                 <strong class="jxr_keyword">if</strong> (fireNow) {
<a class="jxr_linenumber" name="231" href="#231">231</a>                                     fireExceptionCaught(ctx, t);
<a class="jxr_linenumber" name="232" href="#232">232</a>                                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="233" href="#233">233</a>                                     fireExceptionCaughtLater(ctx, t);
<a class="jxr_linenumber" name="234" href="#234">234</a>                                 }
<a class="jxr_linenumber" name="235" href="#235">235</a> 
<a class="jxr_linenumber" name="236" href="#236">236</a>                                 closeInput(chunks);
<a class="jxr_linenumber" name="237" href="#237">237</a>                                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="238" href="#238">238</a>                             }
<a class="jxr_linenumber" name="239" href="#239">239</a> 
<a class="jxr_linenumber" name="240" href="#240">240</a>                             <strong class="jxr_keyword">if</strong> (suspend) {
<a class="jxr_linenumber" name="241" href="#241">241</a>                                 <em class="jxr_comment">// ChunkedInput.nextChunk() returned null and it has</em>
<a class="jxr_linenumber" name="242" href="#242">242</a>                                 <em class="jxr_comment">// not reached at the end of input.  Let's wait until</em>
<a class="jxr_linenumber" name="243" href="#243">243</a>                                 <em class="jxr_comment">// more chunks arrive.  Nothing to write or notify.</em>
<a class="jxr_linenumber" name="244" href="#244">244</a>                                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="245" href="#245">245</a>                             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="246" href="#246">246</a>                                 <a href="../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> writeFuture;
<a class="jxr_linenumber" name="247" href="#247">247</a>                                 <strong class="jxr_keyword">if</strong> (endOfInput) {
<a class="jxr_linenumber" name="248" href="#248">248</a>                                     <strong class="jxr_keyword">this</strong>.currentEvent = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="249" href="#249">249</a>                                     writeFuture = currentEvent.getFuture();
<a class="jxr_linenumber" name="250" href="#250">250</a> 
<a class="jxr_linenumber" name="251" href="#251">251</a>                                     <em class="jxr_comment">// Register a listener which will close the input once the write</em>
<a class="jxr_linenumber" name="252" href="#252">252</a>                                     <em class="jxr_comment">// is complete. This is needed because the Chunk may have some</em>
<a class="jxr_linenumber" name="253" href="#253">253</a>                                     <em class="jxr_comment">// resource bound that can not be closed before its not written</em>
<a class="jxr_linenumber" name="254" href="#254">254</a>                                     <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="255" href="#255">255</a>                                     <em class="jxr_comment">// See https://github.com/netty/netty/issues/303</em>
<a class="jxr_linenumber" name="256" href="#256">256</a>                                     writeFuture.addListener(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/channel/ChannelFutureListener.html">ChannelFutureListener</a>() {
<a class="jxr_linenumber" name="257" href="#257">257</a> 
<a class="jxr_linenumber" name="258" href="#258">258</a>                                         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="259" href="#259">259</a>                                             closeInput(chunks);
<a class="jxr_linenumber" name="260" href="#260">260</a>                                         }
<a class="jxr_linenumber" name="261" href="#261">261</a>                                     });
<a class="jxr_linenumber" name="262" href="#262">262</a>                                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="263" href="#263">263</a>                                     writeFuture = future(channel);
<a class="jxr_linenumber" name="264" href="#264">264</a>                                     writeFuture.addListener(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/channel/ChannelFutureListener.html">ChannelFutureListener</a>() {
<a class="jxr_linenumber" name="265" href="#265">265</a>                                         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="266" href="#266">266</a>                                             <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
<a class="jxr_linenumber" name="267" href="#267">267</a>                                                 currentEvent.getFuture().setFailure(future.getCause());
<a class="jxr_linenumber" name="268" href="#268">268</a>                                                 closeInput((ChunkedInput) currentEvent.getMessage());
<a class="jxr_linenumber" name="269" href="#269">269</a>                                             }
<a class="jxr_linenumber" name="270" href="#270">270</a>                                         }
<a class="jxr_linenumber" name="271" href="#271">271</a>                                     });
<a class="jxr_linenumber" name="272" href="#272">272</a>                                 }
<a class="jxr_linenumber" name="273" href="#273">273</a> 
<a class="jxr_linenumber" name="274" href="#274">274</a>                                 write(
<a class="jxr_linenumber" name="275" href="#275">275</a>                                         ctx, writeFuture, chunk,
<a class="jxr_linenumber" name="276" href="#276">276</a>                                         currentEvent.getRemoteAddress());
<a class="jxr_linenumber" name="277" href="#277">277</a>                             }
<a class="jxr_linenumber" name="278" href="#278">278</a>                         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="279" href="#279">279</a>                             <strong class="jxr_keyword">this</strong>.currentEvent = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="280" href="#280">280</a>                             ctx.sendDownstream(currentEvent);
<a class="jxr_linenumber" name="281" href="#281">281</a>                         }
<a class="jxr_linenumber" name="282" href="#282">282</a>                     }
<a class="jxr_linenumber" name="283" href="#283">283</a> 
<a class="jxr_linenumber" name="284" href="#284">284</a>                     <strong class="jxr_keyword">if</strong> (!channel.isConnected()) {
<a class="jxr_linenumber" name="285" href="#285">285</a>                         discard(ctx, fireNow);
<a class="jxr_linenumber" name="286" href="#286">286</a>                         <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="287" href="#287">287</a>                     }
<a class="jxr_linenumber" name="288" href="#288">288</a>                 }
<a class="jxr_linenumber" name="289" href="#289">289</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="290" href="#290">290</a>                 <em class="jxr_comment">// mark the flush as done</em>
<a class="jxr_linenumber" name="291" href="#291">291</a>                 flush.set(false);
<a class="jxr_linenumber" name="292" href="#292">292</a>             }
<a class="jxr_linenumber" name="293" href="#293">293</a>         }
<a class="jxr_linenumber" name="294" href="#294">294</a> 
<a class="jxr_linenumber" name="295" href="#295">295</a>         <strong class="jxr_keyword">if</strong> (acquired &amp;&amp; (!channel.isConnected() || channel.isWritable() &amp;&amp; !queue.isEmpty() &amp;&amp; !suspend
<a class="jxr_linenumber" name="296" href="#296">296</a>                 || flushNeeded)) {
<a class="jxr_linenumber" name="297" href="#297">297</a>             flush(ctx, fireNow);
<a class="jxr_linenumber" name="298" href="#298">298</a>         }
<a class="jxr_linenumber" name="299" href="#299">299</a>     }
<a class="jxr_linenumber" name="300" href="#300">300</a> 
<a class="jxr_linenumber" name="301" href="#301">301</a>     <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> closeInput(<a href="../../../../../org/jboss/netty/handler/stream/ChunkedInput.html">ChunkedInput</a> chunks) {
<a class="jxr_linenumber" name="302" href="#302">302</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="303" href="#303">303</a>             chunks.close();
<a class="jxr_linenumber" name="304" href="#304">304</a>         } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a class="jxr_linenumber" name="305" href="#305">305</a>             <strong class="jxr_keyword">if</strong> (logger.isWarnEnabled()) {
<a class="jxr_linenumber" name="306" href="#306">306</a>                 logger.warn(<span class="jxr_string">"Failed to close a chunked input."</span>, t);
<a class="jxr_linenumber" name="307" href="#307">307</a>             }
<a class="jxr_linenumber" name="308" href="#308">308</a>         }
<a class="jxr_linenumber" name="309" href="#309">309</a>     }
<a class="jxr_linenumber" name="310" href="#310">310</a> 
<a class="jxr_linenumber" name="311" href="#311">311</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> beforeAdd(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="312" href="#312">312</a>         <em class="jxr_comment">// nothing to do</em>
<a class="jxr_linenumber" name="313" href="#313">313</a>     }
<a class="jxr_linenumber" name="314" href="#314">314</a> 
<a class="jxr_linenumber" name="315" href="#315">315</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> afterAdd(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="316" href="#316">316</a>         <em class="jxr_comment">// nothing to do</em>
<a class="jxr_linenumber" name="317" href="#317">317</a>     }
<a class="jxr_linenumber" name="318" href="#318">318</a> 
<a class="jxr_linenumber" name="319" href="#319">319</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> beforeRemove(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="320" href="#320">320</a>         <em class="jxr_comment">// try to flush again a last time.</em>
<a class="jxr_linenumber" name="321" href="#321">321</a>         <em class="jxr_comment">//</em>
<a class="jxr_linenumber" name="322" href="#322">322</a>         <em class="jxr_comment">// See #304</em>
<a class="jxr_linenumber" name="323" href="#323">323</a>         flush(ctx, false);
<a class="jxr_linenumber" name="324" href="#324">324</a>     }
<a class="jxr_linenumber" name="325" href="#325">325</a> 
<a class="jxr_linenumber" name="326" href="#326">326</a>     <em class="jxr_comment">// This method should not need any synchronization as the ChunkedWriteHandler will not receive any new events</em>
<a class="jxr_linenumber" name="327" href="#327">327</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> afterRemove(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="328" href="#328">328</a>         <em class="jxr_comment">// Fail all MessageEvent's that are left. This is needed because otherwise we would never notify the</em>
<a class="jxr_linenumber" name="329" href="#329">329</a>         <em class="jxr_comment">// ChannelFuture and the registered FutureListener. See #304</em>
<a class="jxr_linenumber" name="330" href="#330">330</a>         Throwable cause = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="331" href="#331">331</a>         <strong class="jxr_keyword">boolean</strong> fireExceptionCaught = false;
<a class="jxr_linenumber" name="332" href="#332">332</a> 
<a class="jxr_linenumber" name="333" href="#333">333</a>         <strong class="jxr_keyword">for</strong> (;;) {
<a class="jxr_linenumber" name="334" href="#334">334</a>             <a href="../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> currentEvent = <strong class="jxr_keyword">this</strong>.currentEvent;
<a class="jxr_linenumber" name="335" href="#335">335</a> 
<a class="jxr_linenumber" name="336" href="#336">336</a>             <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.currentEvent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="337" href="#337">337</a>                 currentEvent = queue.poll();
<a class="jxr_linenumber" name="338" href="#338">338</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="339" href="#339">339</a>                 <strong class="jxr_keyword">this</strong>.currentEvent = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="340" href="#340">340</a>             }
<a class="jxr_linenumber" name="341" href="#341">341</a> 
<a class="jxr_linenumber" name="342" href="#342">342</a>             <strong class="jxr_keyword">if</strong> (currentEvent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="343" href="#343">343</a>                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="344" href="#344">344</a>             }
<a class="jxr_linenumber" name="345" href="#345">345</a> 
<a class="jxr_linenumber" name="346" href="#346">346</a>             Object m = currentEvent.getMessage();
<a class="jxr_linenumber" name="347" href="#347">347</a>             <strong class="jxr_keyword">if</strong> (m instanceof ChunkedInput) {
<a class="jxr_linenumber" name="348" href="#348">348</a>                 closeInput((ChunkedInput) m);
<a class="jxr_linenumber" name="349" href="#349">349</a>             }
<a class="jxr_linenumber" name="350" href="#350">350</a> 
<a class="jxr_linenumber" name="351" href="#351">351</a>             <em class="jxr_comment">// Create exception</em>
<a class="jxr_linenumber" name="352" href="#352">352</a>             <strong class="jxr_keyword">if</strong> (cause == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="353" href="#353">353</a>                 cause = <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Unable to flush event, discarding"</span>);
<a class="jxr_linenumber" name="354" href="#354">354</a>             }
<a class="jxr_linenumber" name="355" href="#355">355</a>             currentEvent.getFuture().setFailure(cause);
<a class="jxr_linenumber" name="356" href="#356">356</a>             fireExceptionCaught = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="357" href="#357">357</a>         }
<a class="jxr_linenumber" name="358" href="#358">358</a> 
<a class="jxr_linenumber" name="359" href="#359">359</a>         <strong class="jxr_keyword">if</strong> (fireExceptionCaught) {
<a class="jxr_linenumber" name="360" href="#360">360</a>             fireExceptionCaughtLater(ctx.getChannel(), cause);
<a class="jxr_linenumber" name="361" href="#361">361</a>         }
<a class="jxr_linenumber" name="362" href="#362">362</a>     }
<a class="jxr_linenumber" name="363" href="#363">363</a> }
</pre>
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